There's usually at least one girl you win over I've found. It's more an issue when you're aiming for a specific class next generation as the girl you pick decides which class you'll be. As for the tying up thing that's a reference to the rather sinister image I mentioned when this happens in which some black mystical tendrils cover the girl. The text from my experience tends towards making it clear the girl is not keen on this but agrees that it is necessary.